<?php

// +----------------------------------------------------------------------
// | H1CMS © OpenSource CMS
// +----------------------------------------------------------------------
// | Copyright (c) 2014-2016 http://www.h1cms.com All rights reserved.
// | Copyright (c) 2014-2016 嘉兴领格信息技术有限公司，并保留所有权利。
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: Allen <allen@lg4.cn>
// +----------------------------------------------------------------------

namespace hmvc;

/**
 * Description of arr
 *
 * @author getssl
 */
class Str {
    
    const NUM = 0;
    const ALNUM = 1;
    const NUMBERIC = 2;
    const ALPHA = 3;
    const MD5 = 4;
    const SHA1 = 5;
    const UUID = 6;
    const UNIQUE = 7;
    const HEXDEC = 8;
    const NOZERO = 9;
    const DISTINCT = 10;
    
    public static function html_escape($text) {
        return htmlspecialchars($text, ENT_QUOTES, 'UTF-8');
    }
    
    public static function decodeEntities($text) {
        return html_entity_decode($text, ENT_QUOTES, 'UTF-8');
    }
    
    public static function format($string, $args = array()) {
        $replace_pairs = [];
        if (!is_array($args)) {
            return $string;
        }
        foreach ($args as $key => $value) {
            $replace_pairs[':' . $key] = static::html_escape($value);
        }
        return strtr($string, $replace_pairs);
    }
    
    public static function token() {
        return md5(str_shuffle(chr(mt_rand(32, 126)) . uniqid() . microtime(TRUE)));
    }
    
    /**
     * 随机生成一个数字
     * @param int $min 最小
     * @param int $max 最大值
     * @return int
     */
    public static function int($min = 0, $max = RAND_MAX) {
        return mt_rand($min, $max);
    }
    
    /**
     * FormatType
     */
    public static function isJson($str) {
        json_decode($str);
        return json_last_error() === JSON_ERROR_NONE;
    }
    
    /*
     public static function slug($title, $separator = '-') {
     $title = static::ascii($title);
     // Convert all dashes/underscores into separator
     $flip = $separator == '-' ? '_' : '-';
     $title = preg_replace('![' . preg_quote($flip) . ']+!u', $separator, $title);
     // Remove all characters that are not the separator, letters, numbers, or whitespace.
     $title = preg_replace('![^' . preg_quote($separator) . '\pL\pN\s]+!u', '', mb_strtolower($title));
     // Replace all separator characters and whitespace by a single separator
     $title = preg_replace('![' . preg_quote($separator) . '\s]+!u', $separator, $title);
     return trim($title, $separator);
     }
     */
    
    /**
     * 判断是否是ASCII
     * @param type $string
     * @return type
     */
    public static function isAscii($string) {
        return !preg_match('/[^\x00-\x7F]/S', $string);
    }
    
    public static function stripImageTags($str) {
        return preg_replace(array('#<img[\s/]+.*?src\s*=\s*["\'](.+?)["\'].*?\>#', '#<img[\s/]+.*?src\s*=\s*(.+?).*?\>#'), '\\1', $str);
    }
    
    public static function startsWithChar($needle, $haystack) {
        return ($needle[0] === $haystack);
    }
    
    public static function endsWithChar($needle, $haystack) {
        return (substr($needle, -1) === $haystack);
    }
    
    /**
     * 随机生成
     * @param int $type 类型
     * @param int $length 长度
     */
    public static function xrandom($type = Str::ALNUM, $length = 6) {
        switch ($type) {
            case Str::NUM:
                return mt_rand();
            case Str::UNIQUE:
                return md5(uniqid(mt_rand()));
            case Str::SHA1 :
                return sha1(uniqid(mt_rand(), true));
            case Str::UUID:
                $pool = array('8', '9', 'a', 'b');
                return sprintf('%s-%s-4%s-%s%s-%s', static::xrandom(Str::HEXDEC, 8), static::xrandom(Str::HEXDEC, 4), static::random('hexdec', 3), $pool[array_rand($pool)],
                    static::random('hexdec', 3), static::random('hexdec', 12));
            case Str::ALPHA:
            case Str::ALNUM:
            case Str::NUMBERIC:
            case Str::NOZERO:
            case Str::DISTINCT:
            case Str::HEXDEC:
                switch ($type) {
                    case Str::ALPHA:
                        $pool = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
                        break;
                    default:
                    case Str::ALNUM:
                        $pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
                        break;
                    case Str::NUMBERIC:
                        $pool = '0123456789';
                        break;
                    case Str::NOZERO:
                        $pool = '123456789';
                        break;
                    case Str::NOZERO:
                        $pool = '2345679ACDEFHJKLMNPRSTUVWXYZ';
                        break;
                    case Str::HEXDEC:
                        $pool = '0123456789abcdef';
                        break;
                }
                $str = '';
                for ($i = 0; $i < $length; $i++) {
                    $str .= substr($pool, mt_rand(0, strlen($pool) - 1), 1);
                }
                return $str;
        }
    }
    
    /**
     * The cache of snake-cased words.
     *
     * @var array
     */
    protected static $snakeCache = [];
    
    /**
     * The cache of camel-cased words.
     *
     * @var array
     */
    protected static $camelCache = [];
    
    /**
     * The cache of studly-cased words.
     *
     * @var array
     */
    protected static $studlyCache = [];
    
    /**
     * Transliterate a UTF-8 value to ASCII.
     *
     * @param  string  $value
     * @return string
     */
    public static function ascii($value) {
        foreach (static::charsArray() as $key => $val) {
            $value = str_replace($val, $key, $value);
        }
        
        return preg_replace('/[^\x20-\x7E]/u', '', $value);
    }
    
    /**
     * Convert a value to camel case.
     *
     * @param  string  $value
     * @return string
     */
    public static function camel($value) {
        if (isset(static::$camelCache[$value])) {
            return static::$camelCache[$value];
        }
        
        return static::$camelCache[$value] = lcfirst(static::studly($value));
    }
    
    /**
     * Determine if a given string contains a given substring.
     *
     * @param  string  $haystack
     * @param  string|array  $needles
     * @return bool
     */
    public static function contains($haystack, $needles) {
        foreach ((array) $needles as $needle) {
            if ($needle != '' && mb_strpos($haystack, $needle) !== false) {
                return true;
            }
        }
        
        return false;
    }
    
    /**
     * Determine if a given string ends with a given substring.
     *
     * @param  string  $haystack
     * @param  string|array  $needles
     * @return bool
     */
    public static function endsWith($haystack, $needles) {
        foreach ((array) $needles as $needle) {
            if (substr($haystack, -strlen($needle)) === (string) $needle) {
                return true;
            }
        }
        
        return false;
    }
    
    /**
     * Cap a string with a single instance of a given value.
     *
     * @param  string  $value
     * @param  string  $cap
     * @return string
     */
    public static function finish($value, $cap) {
        $quoted = preg_quote($cap, '/');
        
        return preg_replace('/(?:' . $quoted . ')+$/u', '', $value) . $cap;
    }
    
    /**
     * Determine if a given string matches a given pattern.
     *
     * @param  string  $pattern
     * @param  string  $value
     * @return bool
     */
    public static function is($pattern, $value) {
        if ($pattern == $value) {
            return true;
        }
        
        $pattern = preg_quote($pattern, '#');
        
        // Asterisks are translated into zero-or-more regular expression wildcards
        // to make it convenient to check if the strings starts with the given
        // pattern such as "library/*", making any string check convenient.
        $pattern = str_replace('\*', '.*', $pattern);
        
        return (bool) preg_match('#^' . $pattern . '\z#u', $value);
    }
    
    /**
     * Return the length of the given string.
     *
     * @param  string  $value
     * @return int
     */
    public static function length($value) {
        return mb_strlen($value);
    }
    
    /**
     * Limit the number of characters in a string.
     *
     * @param  string  $value
     * @param  int     $limit
     * @param  string  $end
     * @return string
     */
    public static function limit($value, $limit = 100, $end = '...') {
        if (mb_strwidth($value, 'UTF-8') <= $limit) {
            return $value;
        }
        
        return rtrim(mb_strimwidth($value, 0, $limit, '', 'UTF-8')) . $end;
    }
    
    /**
     * Convert the given string to lower-case.
     *
     * @param  string  $value
     * @return string
     */
    public static function lower($value) {
        return mb_strtolower($value, 'UTF-8');
    }
    
    /**
     * Limit the number of words in a string.
     *
     * @param  string  $value
     * @param  int     $words
     * @param  string  $end
     * @return string
     */
    public static function words($value, $words = 100, $end = '...') {
        preg_match('/^\s*+(?:\S++\s*+){1,' . $words . '}/u', $value, $matches);
        
        if (!isset($matches[0]) || static::length($value) === static::length($matches[0])) {
            return $value;
        }
        
        return rtrim($matches[0]) . $end;
    }
    
    /**
     * Parse a Class@method style callback into class and method.
     *
     * @param  string  $callback
     * @param  string  $default
     * @return array
     */
    public static function parseCallback($callback, $default) {
        return static::contains($callback, '@') ? explode('@', $callback, 2) : [$callback, $default];
    }
    
    /**
     * Get the plural form of an English word.
     *
     * @param  string  $value
     * @param  int     $count
     * @return string
     */
    public static function plural($value, $count = 2) {
        return Pluralizer::plural($value, $count);
    }
    
    /**
     * Generate a more truly "random" alpha-numeric string.
     *
     * @param  int  $length
     * @return string
     */
    public static function random($length = 16) {
        if (function_exists('random_bytes')) {
            $string = '';
            while (($len = strlen($string)) < $length) {
                $size = $length - $len;
                
                $bytes = random_bytes($size);
                
                $string .= substr(str_replace(['/', '+', '='], '', base64_encode($bytes)), 0, $size);
            }
            return $string;
        }
        return static::quickRandom($length);
    }
    
    /**
     * Generate a "random" alpha-numeric string.
     *
     * Should not be considered sufficient for cryptography, etc.
     *
     * @param  int  $length
     * @return string
     */
    public static function quickRandom($length = 16) {
        
        $pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
        
        return substr(str_shuffle(str_repeat($pool, $length)), 0, $length);
    }
    
    /**
     * Replace a given value in the string sequentially with an array.
     *
     * @param  string  $search
     * @param  array   $replace
     * @param  string  $subject
     * @return string
     */
    public static function replaceArray($search, array $replace, $subject) {
        foreach ($replace as $value) {
            $subject = static::replaceFirst($search, $value, $subject);
        }
        
        return $subject;
    }
    
    /**
     * Replace the first occurrence of a given value in the string.
     *
     * @param  string  $search
     * @param  string  $replace
     * @param  string  $subject
     * @return string
     */
    public static function replaceFirst($search, $replace, $subject) {
        $position = strpos($subject, $search);
        
        if ($position !== false) {
            return substr_replace($subject, $replace, $position, strlen($search));
        }
        
        return $subject;
    }
    
    /**
     * Replace the last occurrence of a given value in the string.
     *
     * @param  string  $search
     * @param  string  $replace
     * @param  string  $subject
     * @return string
     */
    public static function replaceLast($search, $replace, $subject) {
        $position = strrpos($subject, $search);
        
        if ($position !== false) {
            return substr_replace($subject, $replace, $position, strlen($search));
        }
        
        return $subject;
    }
    
    /**
     * Convert the given string to upper-case.
     *
     * @param  string  $value
     * @return string
     */
    public static function upper($value) {
        return mb_strtoupper($value, 'UTF-8');
    }
    
    /**
     * Convert the given string to title case.
     *
     * @param  string  $value
     * @return string
     */
    public static function title($value) {
        return mb_convert_case($value, MB_CASE_TITLE, 'UTF-8');
    }
    
    /**
     * Get the singular form of an English word.
     *
     * @param  string  $value
     * @return string
     */
    public static function singular($value) {
        return Pluralizer::singular($value);
    }
    
    /**
     * Generate a URL friendly "slug" from a given string.
     *
     * @param  string  $title
     * @param  string  $separator
     * @return string
     */
    public static function slug($title, $separator = '-') {
        $title = static::ascii($title);
        
        // Convert all dashes/underscores into separator
        $flip = $separator == '-' ? '_' : '-';
        
        $title = preg_replace('![' . preg_quote($flip) . ']+!u', $separator, $title);
        
        // Remove all characters that are not the separator, letters, numbers, or whitespace.
        $title = preg_replace('![^' . preg_quote($separator) . '\pL\pN\s]+!u', '', mb_strtolower($title));
        
        // Replace all separator characters and whitespace by a single separator
        $title = preg_replace('![' . preg_quote($separator) . '\s]+!u', $separator, $title);
        
        return trim($title, $separator);
    }
    
    /**
     * Convert a string to snake case.
     *
     * @param  string  $value
     * @param  string  $delimiter
     * @return string
     */
    public static function snake($value, $delimiter = '_') {
        $key = $value;
        
        if (isset(static::$snakeCache[$key][$delimiter])) {
            return static::$snakeCache[$key][$delimiter];
        }
        
        if (!ctype_lower($value)) {
            $value = preg_replace('/\s+/u', '', $value);
            
            $value = static::lower(preg_replace('/(.)(?=[A-Z])/u', '$1' . $delimiter, $value));
        }
        
        return static::$snakeCache[$key][$delimiter] = $value;
    }
    
    /**
     * Determine if a given string starts with a given substring.
     *
     * @param  string  $haystack
     * @param  string|array  $needles
     * @return bool
     */
    public static function startsWith($haystack, $needles) {
        foreach ((array) $needles as $needle) {
            if ($needle != '' && substr($haystack, 0, strlen($needle)) === (string) $needle) {
                return true;
            }
        }
        
        return false;
    }
    
    /**
     * Convert a value to studly caps case.
     *
     * @param  string  $value
     * @return string
     */
    public static function studly($value) {
        $key = $value;
        
        if (isset(static::$studlyCache[$key])) {
            return static::$studlyCache[$key];
        }
        
        $value = ucwords(str_replace(['-', '_'], ' ', $value));
        
        return static::$studlyCache[$key] = str_replace(' ', '', $value);
    }
    
    /**
     * Returns the portion of string specified by the start and length parameters.
     *
     * @param  string  $string
     * @param  int  $start
     * @param  int|null  $length
     * @return string
     */
    public static function substr($string, $start, $length = null) {
        return mb_substr($string, $start, $length, 'UTF-8');
    }
    
    /**
     * Make a string's first character uppercase.
     *
     * @param  string  $string
     * @return string
     */
    public static function ucfirst($string) {
        return static::upper(static::substr($string, 0, 1)) . static::substr($string, 1);
    }
    
    /**
     * Returns the replacements for the ascii method.
     *
     * Note: Adapted from Stringy\Stringy.
     *
     * @see https://github.com/danielstjules/Stringy/blob/2.3.1/LICENSE.txt
     *
     * @return array
     */
    protected static function charsArray() {
        static $charsArray;
        
        if (isset($charsArray)) {
            return $charsArray;
        }
        
        return $charsArray = [
            '0' => ['°', '₀', '۰'],
            '1' => ['¹', '₁', '۱'],
            '2' => ['²', '₂', '۲'],
            '3' => ['³', '₃', '۳'],
            '4' => ['⁴', '₄', '۴', '٤'],
            '5' => ['⁵', '₅', '۵', '٥'],
            '6' => ['⁶', '₆', '۶', '٦'],
            '7' => ['⁷', '₇', '۷'],
            '8' => ['⁸', '₈', '۸'],
            '9' => ['⁹', '₉', '۹'],
            'a' => ['à', 'á', 'ả', 'ã', 'ạ', 'ă', 'ắ', 'ằ', 'ẳ', 'ẵ', 'ặ', 'â', 'ấ', 'ầ', 'ẩ', 'ẫ', 'ậ', 'ā', 'ą', 'å', 'α', 'ά', 'ἀ', 'ἁ', 'ἂ', 'ἃ', 'ἄ', 'ἅ', 'ἆ', 'ἇ', 'ᾀ', 'ᾁ', 'ᾂ', 'ᾃ', 'ᾄ', 'ᾅ', 'ᾆ', 'ᾇ', 'ὰ', 'ά', 'ᾰ', 'ᾱ', 'ᾲ', 'ᾳ', 'ᾴ', 'ᾶ', 'ᾷ', 'а', 'أ', 'အ', 'ာ', 'ါ', 'ǻ', 'ǎ', 'ª', 'ა', 'अ', 'ا'],
            'b' => ['б', 'β', 'Ъ', 'Ь', 'ب', 'ဗ', 'ბ'],
            'c' => ['ç', 'ć', 'č', 'ĉ', 'ċ'],
            'd' => ['ď', 'ð', 'đ', 'ƌ', 'ȡ', 'ɖ', 'ɗ', 'ᵭ', 'ᶁ', 'ᶑ', 'д', 'δ', 'د', 'ض', 'ဍ', 'ဒ', 'დ'],
            'e' => ['é', 'è', 'ẻ', 'ẽ', 'ẹ', 'ê', 'ế', 'ề', 'ể', 'ễ', 'ệ', 'ë', 'ē', 'ę', 'ě', 'ĕ', 'ė', 'ε', 'έ', 'ἐ', 'ἑ', 'ἒ', 'ἓ', 'ἔ', 'ἕ', 'ὲ', 'έ', 'е', 'ё', 'э', 'є', 'ə', 'ဧ', 'ေ', 'ဲ', 'ე', 'ए', 'إ', 'ئ'],
            'f' => ['ф', 'φ', 'ف', 'ƒ', 'ფ'],
            'g' => ['ĝ', 'ğ', 'ġ', 'ģ', 'г', 'ґ', 'γ', 'ဂ', 'გ', 'گ'],
            'h' => ['ĥ', 'ħ', 'η', 'ή', 'ح', 'ه', 'ဟ', 'ှ', 'ჰ'],
            'i' => ['í', 'ì', 'ỉ', 'ĩ', 'ị', 'î', 'ï', 'ī', 'ĭ', 'į', 'ı', 'ι', 'ί', 'ϊ', 'ΐ', 'ἰ', 'ἱ', 'ἲ', 'ἳ', 'ἴ', 'ἵ', 'ἶ', 'ἷ', 'ὶ', 'ί', 'ῐ', 'ῑ', 'ῒ', 'ΐ', 'ῖ', 'ῗ', 'і', 'ї', 'и', 'ဣ', 'ိ', 'ီ', 'ည်', 'ǐ', 'ი', 'इ'],
            'j' => ['ĵ', 'ј', 'Ј', 'ჯ', 'ج'],
            'k' => ['ķ', 'ĸ', 'к', 'κ', 'Ķ', 'ق', 'ك', 'က', 'კ', 'ქ', 'ک'],
            'l' => ['ł', 'ľ', 'ĺ', 'ļ', 'ŀ', 'л', 'λ', 'ل', 'လ', 'ლ'],
            'm' => ['м', 'μ', 'م', 'မ', 'მ'],
            'n' => ['ñ', 'ń', 'ň', 'ņ', 'ŉ', 'ŋ', 'ν', 'н', 'ن', 'န', 'ნ'],
            'o' => ['ó', 'ò', 'ỏ', 'õ', 'ọ', 'ô', 'ố', 'ồ', 'ổ', 'ỗ', 'ộ', 'ơ', 'ớ', 'ờ', 'ở', 'ỡ', 'ợ', 'ø', 'ō', 'ő', 'ŏ', 'ο', 'ὀ', 'ὁ', 'ὂ', 'ὃ', 'ὄ', 'ὅ', 'ὸ', 'ό', 'о', 'و', 'θ', 'ို', 'ǒ', 'ǿ', 'º', 'ო', 'ओ'],
            'p' => ['п', 'π', 'ပ', 'პ', 'پ'],
            'q' => ['ყ'],
            'r' => ['ŕ', 'ř', 'ŗ', 'р', 'ρ', 'ر', 'რ'],
            's' => ['ś', 'š', 'ş', 'с', 'σ', 'ș', 'ς', 'س', 'ص', 'စ', 'ſ', 'ს'],
            't' => ['ť', 'ţ', 'т', 'τ', 'ț', 'ت', 'ط', 'ဋ', 'တ', 'ŧ', 'თ', 'ტ'],
            'u' => ['ú', 'ù', 'ủ', 'ũ', 'ụ', 'ư', 'ứ', 'ừ', 'ử', 'ữ', 'ự', 'û', 'ū', 'ů', 'ű', 'ŭ', 'ų', 'µ', 'у', 'ဉ', 'ု', 'ူ', 'ǔ', 'ǖ', 'ǘ', 'ǚ', 'ǜ', 'უ', 'उ'],
            'v' => ['в', 'ვ', 'ϐ'],
            'w' => ['ŵ', 'ω', 'ώ', 'ဝ', 'ွ'],
            'x' => ['χ', 'ξ'],
            'y' => ['ý', 'ỳ', 'ỷ', 'ỹ', 'ỵ', 'ÿ', 'ŷ', 'й', 'ы', 'υ', 'ϋ', 'ύ', 'ΰ', 'ي', 'ယ'],
            'z' => ['ź', 'ž', 'ż', 'з', 'ζ', 'ز', 'ဇ', 'ზ'],
            'aa' => ['ع', 'आ', 'آ'],
            'ae' => ['ä', 'æ', 'ǽ'],
            'ai' => ['ऐ'],
            'at' => ['@'],
            'ch' => ['ч', 'ჩ', 'ჭ', 'چ'],
            'dj' => ['ђ', 'đ'],
            'dz' => ['џ', 'ძ'],
            'ei' => ['ऍ'],
            'gh' => ['غ', 'ღ'],
            'ii' => ['ई'],
            'ij' => ['ĳ'],
            'kh' => ['х', 'خ', 'ხ'],
            'lj' => ['љ'],
            'nj' => ['њ'],
            'oe' => ['ö', 'œ', 'ؤ'],
            'oi' => ['ऑ'],
            'oii' => ['ऒ'],
            'ps' => ['ψ'],
            'sh' => ['ш', 'შ', 'ش'],
            'shch' => ['щ'],
            'ss' => ['ß'],
            'sx' => ['ŝ'],
            'th' => ['þ', 'ϑ', 'ث', 'ذ', 'ظ'],
            'ts' => ['ц', 'ც', 'წ'],
            'ue' => ['ü'],
            'uu' => ['ऊ'],
            'ya' => ['я'],
            'yu' => ['ю'],
            'zh' => ['ж', 'ჟ', 'ژ'],
            '(c)' => ['©'],
            'A' => ['Á', 'À', 'Ả', 'Ã', 'Ạ', 'Ă', 'Ắ', 'Ằ', 'Ẳ', 'Ẵ', 'Ặ', 'Â', 'Ấ', 'Ầ', 'Ẩ', 'Ẫ', 'Ậ', 'Å', 'Ā', 'Ą', 'Α', 'Ά', 'Ἀ', 'Ἁ', 'Ἂ', 'Ἃ', 'Ἄ', 'Ἅ', 'Ἆ', 'Ἇ', 'ᾈ', 'ᾉ', 'ᾊ', 'ᾋ', 'ᾌ', 'ᾍ', 'ᾎ', 'ᾏ', 'Ᾰ', 'Ᾱ', 'Ὰ', 'Ά', 'ᾼ', 'А', 'Ǻ', 'Ǎ'],
            'B' => ['Б', 'Β', 'ब'],
            'C' => ['Ç', 'Ć', 'Č', 'Ĉ', 'Ċ'],
            'D' => ['Ď', 'Ð', 'Đ', 'Ɖ', 'Ɗ', 'Ƌ', 'ᴅ', 'ᴆ', 'Д', 'Δ'],
            'E' => ['É', 'È', 'Ẻ', 'Ẽ', 'Ẹ', 'Ê', 'Ế', 'Ề', 'Ể', 'Ễ', 'Ệ', 'Ë', 'Ē', 'Ę', 'Ě', 'Ĕ', 'Ė', 'Ε', 'Έ', 'Ἐ', 'Ἑ', 'Ἒ', 'Ἓ', 'Ἔ', 'Ἕ', 'Έ', 'Ὲ', 'Е', 'Ё', 'Э', 'Є', 'Ə'],
            'F' => ['Ф', 'Φ'],
            'G' => ['Ğ', 'Ġ', 'Ģ', 'Г', 'Ґ', 'Γ'],
            'H' => ['Η', 'Ή', 'Ħ'],
            'I' => ['Í', 'Ì', 'Ỉ', 'Ĩ', 'Ị', 'Î', 'Ï', 'Ī', 'Ĭ', 'Į', 'İ', 'Ι', 'Ί', 'Ϊ', 'Ἰ', 'Ἱ', 'Ἳ', 'Ἴ', 'Ἵ', 'Ἶ', 'Ἷ', 'Ῐ', 'Ῑ', 'Ὶ', 'Ί', 'И', 'І', 'Ї', 'Ǐ', 'ϒ'],
            'K' => ['К', 'Κ'],
            'L' => ['Ĺ', 'Ł', 'Л', 'Λ', 'Ļ', 'Ľ', 'Ŀ', 'ल'],
            'M' => ['М', 'Μ'],
            'N' => ['Ń', 'Ñ', 'Ň', 'Ņ', 'Ŋ', 'Н', 'Ν'],
            'O' => ['Ó', 'Ò', 'Ỏ', 'Õ', 'Ọ', 'Ô', 'Ố', 'Ồ', 'Ổ', 'Ỗ', 'Ộ', 'Ơ', 'Ớ', 'Ờ', 'Ở', 'Ỡ', 'Ợ', 'Ø', 'Ō', 'Ő', 'Ŏ', 'Ο', 'Ό', 'Ὀ', 'Ὁ', 'Ὂ', 'Ὃ', 'Ὄ', 'Ὅ', 'Ὸ', 'Ό', 'О', 'Θ', 'Ө', 'Ǒ', 'Ǿ'],
            'P' => ['П', 'Π'],
            'R' => ['Ř', 'Ŕ', 'Р', 'Ρ', 'Ŗ'],
            'S' => ['Ş', 'Ŝ', 'Ș', 'Š', 'Ś', 'С', 'Σ'],
            'T' => ['Ť', 'Ţ', 'Ŧ', 'Ț', 'Т', 'Τ'],
            'U' => ['Ú', 'Ù', 'Ủ', 'Ũ', 'Ụ', 'Ư', 'Ứ', 'Ừ', 'Ử', 'Ữ', 'Ự', 'Û', 'Ū', 'Ů', 'Ű', 'Ŭ', 'Ų', 'У', 'Ǔ', 'Ǖ', 'Ǘ', 'Ǚ', 'Ǜ'],
            'V' => ['В'],
            'W' => ['Ω', 'Ώ', 'Ŵ'],
            'X' => ['Χ', 'Ξ'],
            'Y' => ['Ý', 'Ỳ', 'Ỷ', 'Ỹ', 'Ỵ', 'Ÿ', 'Ῠ', 'Ῡ', 'Ὺ', 'Ύ', 'Ы', 'Й', 'Υ', 'Ϋ', 'Ŷ'],
            'Z' => ['Ź', 'Ž', 'Ż', 'З', 'Ζ'],
            'AE' => ['Ä', 'Æ', 'Ǽ'],
            'CH' => ['Ч'],
            'DJ' => ['Ђ'],
            'DZ' => ['Џ'],
            'GX' => ['Ĝ'],
            'HX' => ['Ĥ'],
            'IJ' => ['Ĳ'],
            'JX' => ['Ĵ'],
            'KH' => ['Х'],
            'LJ' => ['Љ'],
            'NJ' => ['Њ'],
            'OE' => ['Ö', 'Œ'],
            'PS' => ['Ψ'],
            'SH' => ['Ш'],
            'SHCH' => ['Щ'],
            'SS' => ['ẞ'],
            'TH' => ['Þ'],
            'TS' => ['Ц'],
            'UE' => ['Ü'],
            'YA' => ['Я'],
            'YU' => ['Ю'],
            'ZH' => ['Ж'],
            ' ' => ["\xC2\xA0", "\xE2\x80\x80", "\xE2\x80\x81", "\xE2\x80\x82", "\xE2\x80\x83", "\xE2\x80\x84", "\xE2\x80\x85", "\xE2\x80\x86", "\xE2\x80\x87", "\xE2\x80\x88", "\xE2\x80\x89", "\xE2\x80\x8A", "\xE2\x80\xAF", "\xE2\x81\x9F", "\xE3\x80\x80"],
        ];
    }
    
    /**
     *
     * Generate v4 UUID
     *
     * Version 4 UUIDs are pseudo-random.
     */
    public static function UUIDv4() {
        return sprintf('%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
            // 32 bits for "time_low"
            mt_rand(0, 0xffff), mt_rand(0, 0xffff),
            // 16 bits for "time_mid"
            mt_rand(0, 0xffff),
            // 16 bits for "time_hi_and_version",
            // four most significant bits holds version number 4
            mt_rand(0, 0x0fff) | 0x4000,
            // 16 bits, 8 bits for "clk_seq_hi_res",
            // 8 bits for "clk_seq_low",
            // two most significant bits holds zero and one for variant DCE1.1
            mt_rand(0, 0x3fff) | 0x8000,
            // 48 bits for "node"
            mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xffff)
            );
    }
    
}
